CVE-2026-11961: unknown user registration & membership Improper Privilege Management
Vulnerability summary
CVE-2026-11961 is a high (CVSS 8.1) Improper Privilege Management vulnerability in unknown user registration & membership. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.8% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 5.2.3.
Timeline
- 17-07-2026PublishedVulnerability first disclosed.
- 17-07-2026Last modifiedVulnerability information updated.
Description
The User Registration & Membership WordPress plugin before 5.2.3 does not validate that the membership tier submitted during public registration is one of the tiers allowed by the registration form before assigning that tier's associated user role, allowing unauthenticated users to register into an arbitrary published membership tier and obtain its role — up to administrator when such a tier exists.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- wordfenceSource8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.38%
Chance of exploitation in the next 30 days
Percentile
31%
Versus all other CVEs
30-day change
0.00 pp
From 0.38% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Unknown1 product
Wordpress1 product
- user-registration≤ 5.2.2 (fixed in 5.2.3)
2 vendors · 2 products